Share-based Compensation (Schedule of Restricted Stock, Restricted Stock Units, and Stock Equivalent Units Activity) (Details) $ / shares in Units, $ in Millions	12 Months Ended
	Jun. 30, 2021 USD ($) $ / shares shares
Restricted Stock
Shares
Nonvested at beginning of year (in shares) | shares	23,200
Granted/additions (in shares) | shares	38,000.0
Vested (in shares) | shares	(11,200)
Nonvested at end of year (in shares) | shares	50,000.0
Weighted Average Grant Date Fair Value
Nonvested at beginning of year (in dollars per share) | $ / shares	$ 42.90
Granted/additions (in dollars per share) | $ / shares	15.98
Vested (in dollars per share) | $ / shares	44.46
Nonvested at end of year (in dollars per share) | $ / shares	$ 22.09
Aggregate Intrinsic Value | $	$ 2.2
Restricted Stock Units
Shares
Nonvested at beginning of year (in shares) | shares	531,500
Granted/additions (in shares) | shares	1,059,700
Vested (in shares) | shares	(127,800)
Forfeited (in shares) | shares	(98,400)
Nonvested at end of year (in shares) | shares	1,365,000
Weighted Average Grant Date Fair Value
Nonvested at beginning of year (in dollars per share) | $ / shares	$ 44.31
Granted/additions (in dollars per share) | $ / shares	14.33
Vested (in dollars per share) | $ / shares	49.51
Forfeited (in dollars per share) | $ / shares	23.94
Nonvested at end of year (in dollars per share) | $ / shares	$ 22.01
Aggregate Intrinsic Value | $	$ 59.3
Stock Equivalent Units
Shares
Nonvested at beginning of year (in shares) | shares	207,600
Granted/additions (in shares) | shares	20,000.0
Converted to common stock (in shares) | shares	(64,800)
Nonvested at end of year (in shares) | shares	162,800
Weighted Average Grant Date Fair Value
Nonvested at beginning of year (in dollars per share) | $ / shares	$ 38.42
Granted/additions (in dollars per share) | $ / shares	15.90
Converted to common stock (in dollars per share) | $ / shares	35.03
Nonvested at end of year (in dollars per share) | $ / shares	$ 37.00
Aggregate Intrinsic Value | $	$ 1.0